678 lines
17 KiB
C
678 lines
17 KiB
C
/*
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* iwmc3200top - Intel Wireless MultiCom 3200 Top Driver
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* drivers/misc/iwmc3200top/main.c
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*
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* Copyright (C) 2009 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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*
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* Author Name: Maxim Grabarnik <maxim.grabarnink@intel.com>
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* -
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*
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/debugfs.h>
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#include <linux/mmc/sdio_ids.h>
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#include <linux/mmc/sdio_func.h>
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#include <linux/mmc/sdio.h>
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#include "iwmc3200top.h"
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#include "log.h"
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#include "fw-msg.h"
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#include "debugfs.h"
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#define DRIVER_DESCRIPTION "Intel(R) IWMC 3200 Top Driver"
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#define DRIVER_COPYRIGHT "Copyright (c) 2008 Intel Corporation."
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#define DRIVER_VERSION "0.1.62"
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MODULE_DESCRIPTION(DRIVER_DESCRIPTION);
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MODULE_VERSION(DRIVER_VERSION);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR(DRIVER_COPYRIGHT);
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/*
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* This workers main task is to wait for OP_OPR_ALIVE
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* from TOP FW until ALIVE_MSG_TIMOUT timeout is elapsed.
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* When OP_OPR_ALIVE received it will issue
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* a call to "bus_rescan_devices".
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*/
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static void iwmct_rescan_worker(struct work_struct *ws)
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{
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struct iwmct_priv *priv;
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int ret;
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priv = container_of(ws, struct iwmct_priv, bus_rescan_worker);
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LOG_INFO(priv, FW_MSG, "Calling bus_rescan\n");
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ret = bus_rescan_devices(priv->func->dev.bus);
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if (ret < 0)
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LOG_INFO(priv, FW_DOWNLOAD, "bus_rescan_devices FAILED!!!\n");
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}
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static void op_top_message(struct iwmct_priv *priv, struct top_msg *msg)
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{
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switch (msg->hdr.opcode) {
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case OP_OPR_ALIVE:
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LOG_INFO(priv, FW_MSG, "Got ALIVE from device, wake rescan\n");
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queue_work(priv->bus_rescan_wq, &priv->bus_rescan_worker);
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break;
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default:
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LOG_INFO(priv, FW_MSG, "Received msg opcode 0x%X\n",
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msg->hdr.opcode);
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break;
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}
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}
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static void handle_top_message(struct iwmct_priv *priv, u8 *buf, int len)
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{
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struct top_msg *msg;
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msg = (struct top_msg *)buf;
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if (msg->hdr.type != COMM_TYPE_D2H) {
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LOG_ERROR(priv, FW_MSG,
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"Message from TOP with invalid message type 0x%X\n",
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msg->hdr.type);
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return;
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}
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if (len < sizeof(msg->hdr)) {
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LOG_ERROR(priv, FW_MSG,
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"Message from TOP is too short for message header "
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"received %d bytes, expected at least %zd bytes\n",
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len, sizeof(msg->hdr));
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return;
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}
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if (len < le16_to_cpu(msg->hdr.length) + sizeof(msg->hdr)) {
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LOG_ERROR(priv, FW_MSG,
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"Message length (%d bytes) is shorter than "
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"in header (%d bytes)\n",
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len, le16_to_cpu(msg->hdr.length));
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return;
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}
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switch (msg->hdr.category) {
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case COMM_CATEGORY_OPERATIONAL:
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op_top_message(priv, (struct top_msg *)buf);
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break;
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case COMM_CATEGORY_DEBUG:
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case COMM_CATEGORY_TESTABILITY:
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case COMM_CATEGORY_DIAGNOSTICS:
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iwmct_log_top_message(priv, buf, len);
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break;
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default:
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LOG_ERROR(priv, FW_MSG,
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"Message from TOP with unknown category 0x%X\n",
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msg->hdr.category);
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break;
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}
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}
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int iwmct_send_hcmd(struct iwmct_priv *priv, u8 *cmd, u16 len)
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{
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int ret;
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u8 *buf;
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LOG_INFOEX(priv, FW_MSG, "Sending hcmd:\n");
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/* add padding to 256 for IWMC */
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((struct top_msg *)cmd)->hdr.flags |= CMD_FLAG_PADDING_256;
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LOG_HEXDUMP(FW_MSG, cmd, len);
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if (len > FW_HCMD_BLOCK_SIZE) {
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LOG_ERROR(priv, FW_MSG, "size %d exceeded hcmd max size %d\n",
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len, FW_HCMD_BLOCK_SIZE);
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return -1;
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}
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buf = kzalloc(FW_HCMD_BLOCK_SIZE, GFP_KERNEL);
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if (!buf) {
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LOG_ERROR(priv, FW_MSG, "kzalloc error, buf size %d\n",
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FW_HCMD_BLOCK_SIZE);
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return -1;
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}
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memcpy(buf, cmd, len);
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sdio_claim_host(priv->func);
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ret = sdio_memcpy_toio(priv->func, IWMC_SDIO_DATA_ADDR, buf,
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FW_HCMD_BLOCK_SIZE);
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sdio_release_host(priv->func);
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kfree(buf);
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return ret;
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}
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int iwmct_tx(struct iwmct_priv *priv, unsigned int addr,
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void *src, int count)
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{
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int ret;
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sdio_claim_host(priv->func);
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ret = sdio_memcpy_toio(priv->func, addr, src, count);
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sdio_release_host(priv->func);
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return ret;
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}
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static void iwmct_irq_read_worker(struct work_struct *ws)
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{
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struct iwmct_priv *priv;
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struct iwmct_work_struct *read_req;
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__le32 *buf = NULL;
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int ret;
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int iosize;
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u32 barker;
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bool is_barker;
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priv = container_of(ws, struct iwmct_priv, isr_worker);
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LOG_INFO(priv, IRQ, "enter iwmct_irq_read_worker %p\n", ws);
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/* --------------------- Handshake with device -------------------- */
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sdio_claim_host(priv->func);
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/* all list manipulations have to be protected by
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* sdio_claim_host/sdio_release_host */
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if (list_empty(&priv->read_req_list)) {
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LOG_ERROR(priv, IRQ, "read_req_list empty in read worker\n");
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goto exit_release;
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}
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read_req = list_entry(priv->read_req_list.next,
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struct iwmct_work_struct, list);
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list_del(&read_req->list);
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iosize = read_req->iosize;
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kfree(read_req);
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buf = kzalloc(iosize, GFP_KERNEL);
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if (!buf) {
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LOG_ERROR(priv, IRQ, "kzalloc error, buf size %d\n", iosize);
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goto exit_release;
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}
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LOG_INFO(priv, IRQ, "iosize=%d, buf=%p, func=%d\n",
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iosize, buf, priv->func->num);
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/* read from device */
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ret = sdio_memcpy_fromio(priv->func, buf, IWMC_SDIO_DATA_ADDR, iosize);
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if (ret) {
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LOG_ERROR(priv, IRQ, "error %d reading buffer\n", ret);
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goto exit_release;
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}
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LOG_HEXDUMP(IRQ, (u8 *)buf, iosize);
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barker = le32_to_cpu(buf[0]);
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/* Verify whether it's a barker and if not - treat as regular Rx */
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if (barker == IWMC_BARKER_ACK ||
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(barker & BARKER_DNLOAD_BARKER_MSK) == IWMC_BARKER_REBOOT) {
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/* Valid Barker is equal on first 4 dwords */
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is_barker = (buf[1] == buf[0]) &&
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(buf[2] == buf[0]) &&
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(buf[3] == buf[0]);
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if (!is_barker) {
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LOG_WARNING(priv, IRQ,
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"Potentially inconsistent barker "
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"%08X_%08X_%08X_%08X\n",
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le32_to_cpu(buf[0]), le32_to_cpu(buf[1]),
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le32_to_cpu(buf[2]), le32_to_cpu(buf[3]));
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}
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} else {
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is_barker = false;
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}
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/* Handle Top CommHub message */
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if (!is_barker) {
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sdio_release_host(priv->func);
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handle_top_message(priv, (u8 *)buf, iosize);
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goto exit;
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} else if (barker == IWMC_BARKER_ACK) { /* Handle barkers */
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if (atomic_read(&priv->dev_sync) == 0) {
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LOG_ERROR(priv, IRQ,
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"ACK barker arrived out-of-sync\n");
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goto exit_release;
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}
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/* Continuing to FW download (after Sync is completed)*/
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atomic_set(&priv->dev_sync, 0);
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LOG_INFO(priv, IRQ, "ACK barker arrived "
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"- starting FW download\n");
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} else { /* REBOOT barker */
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LOG_INFO(priv, IRQ, "Recieved reboot barker: %x\n", barker);
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priv->barker = barker;
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if (barker & BARKER_DNLOAD_SYNC_MSK) {
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/* Send the same barker back */
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ret = sdio_memcpy_toio(priv->func, IWMC_SDIO_DATA_ADDR,
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buf, iosize);
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if (ret) {
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LOG_ERROR(priv, IRQ,
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"error %d echoing barker\n", ret);
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goto exit_release;
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}
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LOG_INFO(priv, IRQ, "Echoing barker to device\n");
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atomic_set(&priv->dev_sync, 1);
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goto exit_release;
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}
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/* Continuing to FW download (without Sync) */
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LOG_INFO(priv, IRQ, "No sync requested "
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"- starting FW download\n");
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}
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sdio_release_host(priv->func);
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LOG_INFO(priv, IRQ, "barker download request 0x%x is:\n", priv->barker);
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LOG_INFO(priv, IRQ, "******* Top FW %s requested ********\n",
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(priv->barker & BARKER_DNLOAD_TOP_MSK) ? "was" : "not");
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LOG_INFO(priv, IRQ, "******* GPS FW %s requested ********\n",
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(priv->barker & BARKER_DNLOAD_GPS_MSK) ? "was" : "not");
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LOG_INFO(priv, IRQ, "******* BT FW %s requested ********\n",
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(priv->barker & BARKER_DNLOAD_BT_MSK) ? "was" : "not");
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if (priv->dbg.fw_download)
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iwmct_fw_load(priv);
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else
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LOG_ERROR(priv, IRQ, "FW download not allowed\n");
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goto exit;
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exit_release:
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sdio_release_host(priv->func);
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exit:
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kfree(buf);
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LOG_INFO(priv, IRQ, "exit iwmct_irq_read_worker\n");
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}
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static void iwmct_irq(struct sdio_func *func)
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{
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struct iwmct_priv *priv;
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int val, ret;
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int iosize;
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int addr = IWMC_SDIO_INTR_GET_SIZE_ADDR;
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struct iwmct_work_struct *read_req;
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priv = sdio_get_drvdata(func);
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LOG_INFO(priv, IRQ, "enter iwmct_irq\n");
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/* read the function's status register */
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val = sdio_readb(func, IWMC_SDIO_INTR_STATUS_ADDR, &ret);
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LOG_INFO(priv, IRQ, "iir value = %d, ret=%d\n", val, ret);
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if (!val) {
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LOG_ERROR(priv, IRQ, "iir = 0, exiting ISR\n");
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goto exit_clear_intr;
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}
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/*
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* read 2 bytes of the transaction size
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* IMPORTANT: sdio transaction size has to be read before clearing
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* sdio interrupt!!!
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*/
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val = sdio_readb(priv->func, addr++, &ret);
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iosize = val;
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val = sdio_readb(priv->func, addr++, &ret);
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iosize += val << 8;
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LOG_INFO(priv, IRQ, "READ size %d\n", iosize);
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if (iosize == 0) {
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LOG_ERROR(priv, IRQ, "READ size %d, exiting ISR\n", iosize);
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goto exit_clear_intr;
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}
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/* allocate a work structure to pass iosize to the worker */
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read_req = kzalloc(sizeof(struct iwmct_work_struct), GFP_KERNEL);
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if (!read_req) {
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LOG_ERROR(priv, IRQ, "failed to allocate read_req, exit ISR\n");
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goto exit_clear_intr;
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}
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INIT_LIST_HEAD(&read_req->list);
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read_req->iosize = iosize;
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list_add_tail(&priv->read_req_list, &read_req->list);
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/* clear the function's interrupt request bit (write 1 to clear) */
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sdio_writeb(func, 1, IWMC_SDIO_INTR_CLEAR_ADDR, &ret);
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queue_work(priv->wq, &priv->isr_worker);
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LOG_INFO(priv, IRQ, "exit iwmct_irq\n");
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return;
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exit_clear_intr:
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/* clear the function's interrupt request bit (write 1 to clear) */
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sdio_writeb(func, 1, IWMC_SDIO_INTR_CLEAR_ADDR, &ret);
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}
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static int blocks;
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module_param(blocks, int, 0604);
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MODULE_PARM_DESC(blocks, "max_blocks_to_send");
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static int dump;
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module_param(dump, bool, 0604);
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MODULE_PARM_DESC(dump, "dump_hex_content");
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static int jump = 1;
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module_param(jump, bool, 0604);
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static int direct = 1;
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module_param(direct, bool, 0604);
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static int checksum = 1;
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module_param(checksum, bool, 0604);
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static int fw_download = 1;
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module_param(fw_download, bool, 0604);
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static int block_size = IWMC_SDIO_BLK_SIZE;
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module_param(block_size, int, 0404);
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static int download_trans_blks = IWMC_DEFAULT_TR_BLK;
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module_param(download_trans_blks, int, 0604);
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static int rubbish_barker;
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module_param(rubbish_barker, bool, 0604);
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#ifdef CONFIG_IWMC3200TOP_DEBUG
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static int log_level[LOG_SRC_MAX];
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static unsigned int log_level_argc;
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module_param_array(log_level, int, &log_level_argc, 0604);
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MODULE_PARM_DESC(log_level, "log_level");
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static int log_level_fw[FW_LOG_SRC_MAX];
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static unsigned int log_level_fw_argc;
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module_param_array(log_level_fw, int, &log_level_fw_argc, 0604);
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MODULE_PARM_DESC(log_level_fw, "log_level_fw");
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#endif
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void iwmct_dbg_init_params(struct iwmct_priv *priv)
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{
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#ifdef CONFIG_IWMC3200TOP_DEBUG
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int i;
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for (i = 0; i < log_level_argc; i++) {
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dev_notice(&priv->func->dev, "log_level[%d]=0x%X\n",
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i, log_level[i]);
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iwmct_log_set_filter((log_level[i] >> 8) & 0xFF,
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log_level[i] & 0xFF);
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}
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for (i = 0; i < log_level_fw_argc; i++) {
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dev_notice(&priv->func->dev, "log_level_fw[%d]=0x%X\n",
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i, log_level_fw[i]);
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iwmct_log_set_fw_filter((log_level_fw[i] >> 8) & 0xFF,
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log_level_fw[i] & 0xFF);
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}
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#endif
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priv->dbg.blocks = blocks;
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LOG_INFO(priv, INIT, "blocks=%d\n", blocks);
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priv->dbg.dump = (bool)dump;
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LOG_INFO(priv, INIT, "dump=%d\n", dump);
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priv->dbg.jump = (bool)jump;
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LOG_INFO(priv, INIT, "jump=%d\n", jump);
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priv->dbg.direct = (bool)direct;
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LOG_INFO(priv, INIT, "direct=%d\n", direct);
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priv->dbg.checksum = (bool)checksum;
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LOG_INFO(priv, INIT, "checksum=%d\n", checksum);
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priv->dbg.fw_download = (bool)fw_download;
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LOG_INFO(priv, INIT, "fw_download=%d\n", fw_download);
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priv->dbg.block_size = block_size;
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LOG_INFO(priv, INIT, "block_size=%d\n", block_size);
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priv->dbg.download_trans_blks = download_trans_blks;
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LOG_INFO(priv, INIT, "download_trans_blks=%d\n", download_trans_blks);
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}
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/*****************************************************************************
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*
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* sysfs attributes
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*
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*****************************************************************************/
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static ssize_t show_iwmct_fw_version(struct device *d,
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struct device_attribute *attr, char *buf)
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{
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struct iwmct_priv *priv = dev_get_drvdata(d);
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return sprintf(buf, "%s\n", priv->dbg.label_fw);
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}
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static DEVICE_ATTR(cc_label_fw, S_IRUGO, show_iwmct_fw_version, NULL);
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#ifdef CONFIG_IWMC3200TOP_DEBUG
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static DEVICE_ATTR(log_level, S_IWUSR | S_IRUGO,
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show_iwmct_log_level, store_iwmct_log_level);
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static DEVICE_ATTR(log_level_fw, S_IWUSR | S_IRUGO,
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show_iwmct_log_level_fw, store_iwmct_log_level_fw);
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#endif
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static struct attribute *iwmct_sysfs_entries[] = {
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&dev_attr_cc_label_fw.attr,
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#ifdef CONFIG_IWMC3200TOP_DEBUG
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&dev_attr_log_level.attr,
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&dev_attr_log_level_fw.attr,
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#endif
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NULL
|
|
};
|
|
|
|
static struct attribute_group iwmct_attribute_group = {
|
|
.name = NULL, /* put in device directory */
|
|
.attrs = iwmct_sysfs_entries,
|
|
};
|
|
|
|
|
|
static int iwmct_probe(struct sdio_func *func,
|
|
const struct sdio_device_id *id)
|
|
{
|
|
struct iwmct_priv *priv;
|
|
int ret;
|
|
int val = 1;
|
|
int addr = IWMC_SDIO_INTR_ENABLE_ADDR;
|
|
|
|
dev_dbg(&func->dev, "enter iwmct_probe\n");
|
|
|
|
dev_dbg(&func->dev, "IRQ polling period id %u msecs, HZ is %d\n",
|
|
jiffies_to_msecs(2147483647), HZ);
|
|
|
|
priv = kzalloc(sizeof(struct iwmct_priv), GFP_KERNEL);
|
|
if (!priv) {
|
|
dev_err(&func->dev, "kzalloc error\n");
|
|
return -ENOMEM;
|
|
}
|
|
priv->func = func;
|
|
sdio_set_drvdata(func, priv);
|
|
|
|
|
|
/* create drivers work queue */
|
|
priv->wq = create_workqueue(DRV_NAME "_wq");
|
|
priv->bus_rescan_wq = create_workqueue(DRV_NAME "_rescan_wq");
|
|
INIT_WORK(&priv->bus_rescan_worker, iwmct_rescan_worker);
|
|
INIT_WORK(&priv->isr_worker, iwmct_irq_read_worker);
|
|
|
|
init_waitqueue_head(&priv->wait_q);
|
|
|
|
sdio_claim_host(func);
|
|
/* FIXME: Remove after it is fixed in the Boot ROM upgrade */
|
|
func->enable_timeout = 10;
|
|
|
|
/* In our HW, setting the block size also wakes up the boot rom. */
|
|
ret = sdio_set_block_size(func, priv->dbg.block_size);
|
|
if (ret) {
|
|
LOG_ERROR(priv, INIT,
|
|
"sdio_set_block_size() failure: %d\n", ret);
|
|
goto error_sdio_enable;
|
|
}
|
|
|
|
ret = sdio_enable_func(func);
|
|
if (ret) {
|
|
LOG_ERROR(priv, INIT, "sdio_enable_func() failure: %d\n", ret);
|
|
goto error_sdio_enable;
|
|
}
|
|
|
|
/* init reset and dev_sync states */
|
|
atomic_set(&priv->reset, 0);
|
|
atomic_set(&priv->dev_sync, 0);
|
|
|
|
/* init read req queue */
|
|
INIT_LIST_HEAD(&priv->read_req_list);
|
|
|
|
/* process configurable parameters */
|
|
iwmct_dbg_init_params(priv);
|
|
ret = sysfs_create_group(&func->dev.kobj, &iwmct_attribute_group);
|
|
if (ret) {
|
|
LOG_ERROR(priv, INIT, "Failed to register attributes and "
|
|
"initialize module_params\n");
|
|
goto error_dev_attrs;
|
|
}
|
|
|
|
iwmct_dbgfs_register(priv, DRV_NAME);
|
|
|
|
if (!priv->dbg.direct && priv->dbg.download_trans_blks > 8) {
|
|
LOG_INFO(priv, INIT,
|
|
"Reducing transaction to 8 blocks = 2K (from %d)\n",
|
|
priv->dbg.download_trans_blks);
|
|
priv->dbg.download_trans_blks = 8;
|
|
}
|
|
priv->trans_len = priv->dbg.download_trans_blks * priv->dbg.block_size;
|
|
LOG_INFO(priv, INIT, "Transaction length = %d\n", priv->trans_len);
|
|
|
|
ret = sdio_claim_irq(func, iwmct_irq);
|
|
if (ret) {
|
|
LOG_ERROR(priv, INIT, "sdio_claim_irq() failure: %d\n", ret);
|
|
goto error_claim_irq;
|
|
}
|
|
|
|
|
|
/* Enable function's interrupt */
|
|
sdio_writeb(priv->func, val, addr, &ret);
|
|
if (ret) {
|
|
LOG_ERROR(priv, INIT, "Failure writing to "
|
|
"Interrupt Enable Register (%d): %d\n", addr, ret);
|
|
goto error_enable_int;
|
|
}
|
|
|
|
sdio_release_host(func);
|
|
|
|
LOG_INFO(priv, INIT, "exit iwmct_probe\n");
|
|
|
|
return ret;
|
|
|
|
error_enable_int:
|
|
sdio_release_irq(func);
|
|
error_claim_irq:
|
|
sdio_disable_func(func);
|
|
error_dev_attrs:
|
|
iwmct_dbgfs_unregister(priv->dbgfs);
|
|
sysfs_remove_group(&func->dev.kobj, &iwmct_attribute_group);
|
|
error_sdio_enable:
|
|
sdio_release_host(func);
|
|
return ret;
|
|
}
|
|
|
|
static void iwmct_remove(struct sdio_func *func)
|
|
{
|
|
struct iwmct_work_struct *read_req;
|
|
struct iwmct_priv *priv = sdio_get_drvdata(func);
|
|
|
|
priv = sdio_get_drvdata(func);
|
|
|
|
LOG_INFO(priv, INIT, "enter\n");
|
|
|
|
sdio_claim_host(func);
|
|
sdio_release_irq(func);
|
|
sdio_release_host(func);
|
|
|
|
/* Safely destroy osc workqueue */
|
|
destroy_workqueue(priv->bus_rescan_wq);
|
|
destroy_workqueue(priv->wq);
|
|
|
|
sdio_claim_host(func);
|
|
sdio_disable_func(func);
|
|
sysfs_remove_group(&func->dev.kobj, &iwmct_attribute_group);
|
|
iwmct_dbgfs_unregister(priv->dbgfs);
|
|
sdio_release_host(func);
|
|
|
|
/* free read requests */
|
|
while (!list_empty(&priv->read_req_list)) {
|
|
read_req = list_entry(priv->read_req_list.next,
|
|
struct iwmct_work_struct, list);
|
|
|
|
list_del(&read_req->list);
|
|
kfree(read_req);
|
|
}
|
|
|
|
kfree(priv);
|
|
}
|
|
|
|
|
|
static const struct sdio_device_id iwmct_ids[] = {
|
|
/* Intel Wireless MultiCom 3200 Top Driver */
|
|
{ SDIO_DEVICE(SDIO_VENDOR_ID_INTEL, 0x1404)},
|
|
{ }, /* Terminating entry */
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(sdio, iwmct_ids);
|
|
|
|
static struct sdio_driver iwmct_driver = {
|
|
.probe = iwmct_probe,
|
|
.remove = iwmct_remove,
|
|
.name = DRV_NAME,
|
|
.id_table = iwmct_ids,
|
|
};
|
|
|
|
static int __init iwmct_init(void)
|
|
{
|
|
int rc;
|
|
|
|
/* Default log filter settings */
|
|
iwmct_log_set_filter(LOG_SRC_ALL, LOG_SEV_FILTER_RUNTIME);
|
|
iwmct_log_set_filter(LOG_SRC_FW_MSG, LOG_SEV_FILTER_ALL);
|
|
iwmct_log_set_fw_filter(LOG_SRC_ALL, FW_LOG_SEV_FILTER_RUNTIME);
|
|
|
|
rc = sdio_register_driver(&iwmct_driver);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static void __exit iwmct_exit(void)
|
|
{
|
|
sdio_unregister_driver(&iwmct_driver);
|
|
}
|
|
|
|
module_init(iwmct_init);
|
|
module_exit(iwmct_exit);
|
|
|